<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>068-var的使用.html</title>
	<script>
		// var a
		function fn(){
			"use strict"
			var a = 1;
			// console.log("fn:::",a);//1
		}
		fn();
		// console.log("global:::",a);//1
	</script>
</head>
<body>
	
</body>
</html>